Causes of Low Water Pressure in the House
Few things are more frustrating than stepping into the shower only to have the water pressure drop— or disappear —without warning. Whether it’s a trickle from the bathroom sink or fluctuating water pressure while doing dishes, pressure inconsistencies can disrupt your day. They may also signal plumbing issues or a water quality system malfunction.
If you’ve ever asked, “Why does my water pressure fluctuate?” or noticed that water pressure in your house is suddenly low, you’re not alone. In this blog, we’ll explain common causes of water pressure changes, when to be concerned, and what you can do about it.
Common Reasons for Low or Inconsistent Water Pressure
1. Clogged or Corroded Pipes
Over time, pipes can accumulate sediment, minerals, and rust, especially if you have hard water, acidic water, or aging plumbing. These blockages reduce the internal diameter of your pipes, restricting flow and causing poor or fluctuating water pressure. If water pressure drops and then comes back, you may be dealing with intermittent clogging that shifts with water usage.
If pipe clogs or corrosion are due to mineral scaling from hard or acidic water, American Aqua can help! Contact us to learn about our water softeners and acid neutralizer systems.
2. Municipal Water Supply Issues
If your water pressure is low in the house suddenly, the problem may lie beyond your property line. Municipal water suppliers occasionally perform maintenance, repairs, or system testing that can temporarily reduce pressure.
Check with your local utility company to see if there are any ongoing water system updates or emergency repairs. If your neighbors are experiencing similar issues, this is a likely cause and usually temporary.
3. Partially Closed Shut-Off Valve
Your home’s main water shut-off valve controls the flow of water into your plumbing system. If it’s partially closed, it can lead to water pressure changes in the house.
Make sure the valve (usually located near your water meter or where the main line enters your home) is fully open. A partially closed valve is one of the easiest things to overlook when trying to determine the cause of low water pressure.
4. Failing Water Pressure Regulator
Many homes have a pressure regulator (also known as a pressure-reducing valve or PRV) installed where the main water line enters the home. This device helps keep your water pressure within a safe and steady range.
If your regulator begins to fail, you might notice water pressure fluctuating from one faucet to the next or rapid changes in water pressure in the shower. Replacing a faulty regulator typically resolves the issue quickly.
5. Faulty or Aging Plumbing Fixtures or Appliances
Sometimes, a water pressure issue is limited to just one faucet, showerhead, or appliance. In these cases, the fixture or appliance itself might be clogged with mineral deposits or simply wearing out.
If you’re seeing water pressure changes in the shower, unscrew the showerhead and clean out any sediment or buildup. If the problem persists across multiple fixtures or appliances, the issue may be deeper in your plumbing system. For example, you may have hard water causing limescale buildup or sediment clogging aerators.
6. Leaks in Your Plumbing System
Leaks can divert water away from fixtures and lower the overall pressure in your home. These leaks aren’t always visible, especially if they’re behind walls or underground.
Look for signs like damp walls, water stains, higher water bills, or the sound of running water when everything is off. If you suspect a hidden leak, it’s important to act quickly. Professional leak detection can prevent further damage and restore proper water flow.
7. Split Water Usage
In homes with older plumbing or limited water supplies, using multiple fixtures at once (like running the dishwasher while showering) can cause noticeable pressure drops.
If your water pressure drops, then comes back once another fixture is turned off, this may simply be a case of competing usage. A professional plumber can help evaluate if upsizing supply lines or installing a pressure-boosting system would help.
8. Well Pump or Pressure Tank Problems
If your home relies on a private well, fluctuating water pressure could stem from issues with your well pump or pressure tank. When these systems fail or fall out of calibration, it can cause water pressure that fluctuates throughout the home. It’s a good idea to schedule regular well system inspections and maintenance to catch these issues early.
9. Water Treatment Equipment Issues
If you use a softener, reverse osmosis system, or filtration equipment, they may be contributing to pressure changes. Sometimes, filters are overdue for replacement, or your system may be experiencing fouling or clogs.
At American Aqua, we offer services that can uncover the root of water pressure issues. Regular tune-ups, timely filter changes, and professional inspections help prevent pressure fluctuations and protect your treatment equipment. Schedule your annual system check with our professionals today!
10. Water Heater Problems
If you’re noticing water pressure changes, especially with hot water, the issue may lie with your water heater. Over time, sediment can build up inside the tank, restricting water flow and reducing pressure. In tankless systems, mineral scaling can have a similar effect.
Signs your water heater may be contributing to fluctuating water pressure include:
- Hot water pressure that is noticeably lower than cold
- Inconsistent pressure when switching between hot and cold water
- Delays in hot water delivery
Regular maintenance, including flushing your tank annually, can help prevent these issues. It’s also worth scheduling water testing to see if you have hard water or sediment in your water supply. If this is the case, American Aqua’s professionals can recommend the best whole-home water filtration system.
How To Prevent and Fix Water Pressure Problems
Here are a few proactive steps you can take to prevent and resolve water pressure fluctuations in your home:
- Schedule annual inspections for your plumbing and residential water treatment systems.
- Replace filters according to the manufacturer’s recommended schedule.
- Flush or descale fixtures that show signs of mineral buildup.
- Test for leaks if you notice unexplained changes in water pressure or utility bills.
- Work with our water quality professionals to make sure your softener, RO system, or filtration equipment is operating efficiently.
Contact American Aqua Today
Persistent water pressure issues are more than just inconvenient; they can point to a deeper problem that needs attention. Whether you’re experiencing poor water pressure or water pressure that drops then comes back, American Aqua is here to help. Our local water treatment specialists have the tools and experience to identify the cause and deliver custom solutions.
Ready to fix your water pressure problems for good? Contact American Aqua today to book a service appointment and get a quote for your home’s water treatment needs.